使用 web3.js 1.2.6 呼叫視圖函式

我正在嘗試呼叫僅查看功能，不確定這是否是正確的程序。在結果中獲得成功，但結果格式不同。這是錯的嗎？

const NODE_ADDRESS = config.web3Provider;

   const sourceCode = fs.readFileSync('path_to_contract', 'utf8').toString();
   const compiledCode = compiler.compile(sourceCode, 1).contracts[':ContractName']
   const abi = JSON.parse(compiledCode.interface);

   async function send(web3, transaction) {
       while (true) {
           try {
               const options = {
                   to: transaction._parent._address,
                   data: transaction.encodeABI(),
                   gas: 210000,
                   gasPrice: 10000000000,
               };
               const receipt = await web3.eth.call(options);
               return receipt;
           }
           catch (error) {
               return error
           }
       }
   }

   async function run() {
       try {
           const web3 = new Web3(NODE_ADDRESS);
           const contract = new web3.eth.Contract(abi, contractAddr);
           const transaction = contract.methods.getBuyerInfo();
           const receipt = await send(web3, transaction);
           console.log(JSON.stringify(receipt, null, 4));
           if (web3.currentProvider.constructor.name == "WebsocketProvider")
               web3.currentProvider.connection.close();
           if (receipt) {
               next(null, receipt)
           }
       } catch (error) {
           next(error, null)
       }
   }
   run();

結果 ：-

{
   "status": 1,
   "message": "Success",
   "data": "0x0000000000000000000000000000000000000000000000000000000000000060000000000000000000000000f61343ef22bbccc7221dcda85c5a69219ea00c2b0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000c50756e656574204b756d61720000000000000000000000000000000000000000"
}

這行得通！

const contractAddr = "0x......"
const sourceCode = fs.readFileSync('path_to_contract', 'utf8').toString();
   const compiledCode = compiler.compile(sourceCode, 1).contracts[':ContractName']
   const abi = JSON.parse(compiledCode.interface);

   const contractInstance = new web3.eth.Contract(abi , contractAddr);
   contractInstance.methods.functionName().call((err, result) => {
       if (err){
           next(err, null)
       } else {
           next (null, result)
       }
   })

call不返回收據而是函式的實際值，因為它在節點上本地執行。

但是返回的對像是一個承諾，所以你需要await它。

引用自：https://ethereum.stackexchange.com/questions/82754